Boat-transporting apparatus



Sept; 8, 1925.

J. J; R. HAALCK BOAT TRANSPORTING APPARATUS Filed March 25, 1924 4 Sheets-Sheet l a ign-.114

Sept. 8, 1925. 1,552,839

J. J. R. HAALCK BOAT I TRANSPORTING APPARATUS Filed latch 25, 1924 4 Sheets-Sheet 2 Jaw Sept. 8, I 925.

J. J. R. HAALCK BOAT TRANSPORTING APPARATUS Filed Hatch 25, 1924 4 Sheets-Sheet 3 jwuvmtoz J J19, fiddl Sept. '8, 1925. v I 1,552,839

J. J. R. HAALCK BOAT TRANSPORTING APPARATUS Filcd March 25. 1924 4 Shouts-Sheet 4 Patented Sept. 8, 1925.

UNITED STATES PATENT OFFICE.

BOAT-TRANSPORTING APPARATUS.

Application filed March 25, 1924. Serial No. 701,724.

To all whom it may concern:

Be it known that I, JOHANN JUncnN RIOHARD HAALCK, a citizen of Germany, (who has declared his intention to become a citizen of the United States), residing at Bakersfield, in the county of Kern and State of California, have invented certain new and useful Improvements in Boat-Transporting Apparatus, of which the following is a 19 specification, reference being had to the accompanying drawings.

This invention relates to means for transporting boats of the general character of the apparatus illustrated in my previous Patents #1,259,620, of March 19, 1918,

#1,259,619, of March 19, 1918, and #1283,- 744, of November 5, 1918. These patents all disclose a boat transporting structure whereby a boat may be carried from one body of water to another at a different altitude so as to thus permit the boat to be transported across hills divides and up and down hillsides from a lower to a higher point and vice versa while the boat is held in a horizontal position at all times, the mechanism being particularly designed to be used in connection with a series of'canals at different levels.

More specifically, my present object is to provide a structure operating on an inclined rail bed and moving into the water of a relatively low river or canal at the base of said rail bed, movable over the rails to a higher level and into the water of a second canal or waterway at a higher level, this structure including a wheeled transporting structure adapted to be shifted intoposition beneath the boat in relatively deep water and then shifted with the boat into relatively shallower water so that the bed for the boat which is carried by the transporting structure will gradually rise beneath the bottom of the boat and lift it up until the boat rests entirely upon the bed, and to provide means whereby either end of the boat may be raised to thus cause the boat to stay on an even keel while the transporter is moving upon the inclined track, means being provided, of course, whereby the raised end of the rail'bed may be lowered again as the transporter nears a horizontal portion of the track or a portion of the track which is at a less inclination so as to thereby keep the boat on an even keel.

A further object is to provide a structure of this kind which is so arranged that vessels of different lengths may be readily ace commodated and transported Without any change in the structure.

A still further object is to provide a cradle or bed for the vessel of such character that no injury will be done to the vessel and that the vessel will be yieldingly supported. Another object is to provide improved means whereby the boat maybe tilted with relation to the main structure of the transporter and whereby the driving mechanism of the transporter and the means for tilting may be entirely controlled by a single oper ator and by very simple mechanism.

Still another object is to provide means for locking the bed structure or cradle at one end to the main frame of the transporter so as, to prevent this end from leaving the hearings in which it is supported, while the other end is left free to be raised or lowered by the elevating mechanism.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein Figure 1 is a cross sectional View through a canal or other body of water showing my boat transporting apparatus in end elevation;

Figure 2 is a side elevation of the boat transporting apparatus showing the position .taken by the parts when the transporter is moving up an incline;

Figure 3 is a like view to Figure -1 but showing the transporter on level ground, the side wall of the house being broken away; I

Figure 4: is a fragmentary top plan view of the bed on which the boat is supported;

Figure 5 is a top plan view of the mechanisgi whereby the lifting screws are operate 7 ;Figure 6 is a top plan view of the mechanism whereby the transporter: is caused to travel backward and i Figure 7 is a fragmentary perspective view of the transporter frame and the elevating frame, showing the jack screws;

Figure 8 is a fragmentary vertical sectional view through the transporter and the elevator, showing the jack strews and the means for operating the same Figure 9 is a fragmentary side elevation of the main frame ofthe conveyor? and the elevating frame, showing the bolt for looking the elevator frame to its tfrtirflioifs showing the manner of o eratingthe boat;

Figure 10 is a perspeeive tiew showing the transporter and the elevator and the pivotal support for the latter; p

Figure 11 is a perspective view showing the manner in'whi-ch the trespass are supported a es the seawater ffafiff Figure 12 is a horizonta sectiofial view through the transporter frahie and the ele vator frame, showing the" manner of cifirating the locking bolt 44..

Referring to these drawings, it will be seen that the rnairi frame of the transporter, which maiframe is generally designated 10, has a length about that of the aterage vessel to be handled and a widthgr'a tei' than the average vessel to behaiidld; While I have illustrated this niain frame an its transporter as cdnsisting of longitu members 11 and vertical members 12 with cross braces or stays 13, I do not wish td be limited to this as it might he (idr'istructed in any suitable manner and the beams 11 and 12 may be inadehf angle iron, channel iron or of wood, if necessary, and any other means of bracing the frame and rendering it rigid may be used. This frame is ended and the frame is ii bi'rati'velj stipported at each end upon truclis' 14 having axles 15 carrying wheels16, these whee-ls running upon rails 17 The rails 17 constitute the track and for a-portion of the length of the track extend horizontally beneath the water of a pool or basin and then extend upward at an: inclination to the height to he reached their may eittehd again horizontally and into a pool or basin at this relatively hi her altitude or may ex: tend downward toanother basin at the same altitude as the first seem. y

In the one case the vessel is to be t ans: ported up a hillside into the upper Basin and in the other ease the vessel is to be transported over a hill or, divide and car: ried down into water which is approxi-' mately on aleve l with that of the first basin or pool. Itlwi'll be understood that these basins or pools referred to are merely enlargements of a canal or other waterway.

This rfiairi frame carries" upon it the house 18 wherein the mechanism for driving. the main is located and wherein the ellectric' motor heated. The ietrie' meter is operatively cdiili'e cted to the wheels 16 so as to drive the same, and I have illustrated for this purpose one of the axles 15 at each end of the machine (or both axles if desired) as having mounted thereon a beveled gear wheel 19, this beveled gear wheel Being driven by a beveled gear wheel 20' mounted upon a vertical shaft 21 and extending into the house 18 and being operativety connected to the; driving mechanism as will appear more fully hereinafter.

inasmuch as the wheels 16 running upon the tracks 17 would have but a relatively Saran reactive that where the transporter is moving up an incline, I preferably provide rails 22 mounted u ponlthe o ross ties 28 of the track strtieture, these rails 22 being cogged or toothed, and there being mounted sees the shafts or alit-les' 15 gear wheels 24 which mesh these (begged rails 22. any other means or mechanically forcing the striicture to have along the rails might be used;

The frame is provided at opposite ehds' with the brackets 25 having laterally projecting trunnions 2 6, dis-posed was-- in the maiji frame is the vessel eleva in frame, designated l. b n generally 27, a'nd llustrated as consistin or the longitudinal members 28 and 29, the vertical. inein hers 30',- and bracing striit's or truss rods 31; I do not Wish td be limited to any p'a-r-' tiou'lar oonstrtictioh for this lifting frame, as it might be constructed iii various ways withoiit departing from the spirit of the revenues. As illristrated, the lower beans 28 are longer than the niajiii frame 10 as project beyond the ends of this ihaiii frame at 28*. Adjacent the ppetiteehds fit each of the members 28 there is provided the bearings 32 whichare adapted to rest span the trunnions 26. When the elevating frame or lifting frame 27 is disposed in a horizontal position, both of these bearings 32 rest upon the trim'niofis 26. When, new ever one end of the lifting frame is raised the bearing members at that e'h'd lift off of the corresponding trunnions 26, while the; bearing members at the opposite ends rest tipon the mansions. These tr'finnions', therefore, eonstitute the fulcruins" for the elevatmg time. This elevating frameat one side is provided with a plurality of tip wardly extenaia eas 33, a) which the vessel A is adaptd tied; The opp-o site ends ofthe vessel elevating frame are adapted to be raised infeans of the jack screws 34. I have slfowh four of these screws mounted in bearings iii the end inemg hers 3'5, of the frame, and each set of these jack screws pass throhgh arid hav'e strew-thrade engagement vwith a transverse beam 36. This transverse beani 36 is ada t d fieefl ege beneath the projecting ends .28 of the beams 28 when rte beam 36' is raised. Tweet jerk screws are rotatable i-ll their lower ends in the transverse beam 37 forming part of the main frame, and each jack screw at its lower end carriesa beveled gear wheel 38 engaging the beveled gear wheel 39 mounted upon a transverse shaft 40, which in turn is operated from the driving mechanism, as will be later described. It is obvious now that if the jack screws 34 at one end of the main frame are operated, that end of the vessel elevating frame will be lifted. The means whereby this lifting operation is secured will be hereafter described.

Connected to the longitudinal members 29 at intervals are coiled contractile springs 41, these springs being connected to a seriesof links 42, to which transversely extending cables 43 are connected, the cables and the springs together constituting a bed or cradle which will conform more or less to the shape of the hull of the boat and will yieldingly support the same and so support the boat that the strain will be distributed over the entire structure to a considerable extent. It

will be understood that a boat smaller than the supporting frame or longer than the supporting frame may be liftedif desired, and that while the transporter will'be ofa length adapted to certain types of vessels or boats, variations in length and width are provided for.

The longitudinal beams 28 extend beyond the end supports of the elevating frame 27, there being a plurality of these longitudinal beams 28, as shown in Figure 1, and this is for the purpose of permitting that end of the elevating frame which is to turn upon the trunnions 26 to be locked from movement away from these trunnions, while the other end of this elevating frame may be unlocked. To this end, each end of the elevating frame is provided with a transversely extending locking bar 44 mounted in guides in the end vertical members 12, this locking bar 44 being provided with rack teeth 45. There are two of these bars located at opposite ends of the machine and operated by means of gear wheels 46 carried upon the ends of the manually operable shafts 47 which extend into the operating house 18. By rotating this shaft 47 in one direction the locking bar will be projected and in the opposite direction thelocking bar will be withdrawn. Thus it will be seen that the elevating frame may be locked down to one of the pairs of trunnions, while the opposite end of the elevating frame is unlocked so as to permit it to be raised and lowered. This locking device prevents the elevating frame under any circumstances from escaping from its trunnions.

The driving and elevating mechanism has before been referred to. The means whereby the shaft 21 is driven. and whereby thesisrating screws are operated is as follows: The shaft 21 has at its end opposite the gear wheel 20 the beveled gear wheel 48 which meshes with a beveled gear wheel 49 on a shaft 50. Mounted on the same shaft is a beveled gear wheel 51 which engages a beveled gear wheel 52 on shaft 21 having gear wheel 20 which engages the beveled gear wheel 19 on a like shaft 15 at the opposite end of the machine. The shaft carries at one end the sprocket wheel 53, and also has mounted upon it the toothed gear wheel 54. A power driven shaft 55 is driven from the motor by means of a belt 56 or any other suitable means, the belt passing over a pulley 57, and this shaft is preferably formed in two parts, there being a friction clutch or friction block 58 between the two sections 55 and 55 so that there will be a slight yield sufficient to prevent too great a shock comin upon the driving mechanism when the load is first lifted.

Mounted upon this shaft 55 is the sprocket wheel 59 and gear wheel 60, the gear wheel 60 meshing with the gear wheel 54, while over the sprocket wheels 59 and 53passes the sprocket chain 61. The sprocket wheel 59 and the gear wheel 60 are loose upon the shaft 55, but splined upon this shaft is a shiftable clutch 62 operated by means'of a lever 63, and when this clutch is thrown into engagement with the sprocket wheel 59, this sprocket wheel is caused to turn while the gear wheel 60 remains idle, and then the clutch is shifted in the opposite direction, the gear wheel 60 turns, and the sprocket wheel remains idle. Thus it will be seen that the shaft 50 may be driven in one or the other direction by shifting the clutch 62 and that in its intermediate or neutral position the shaft 50 will not be driven at all from the shaft 55. The lever 63 may extend up through the floor of the house.

The shaft for raising or lowering the opposite ends of theelevating frame is desig nated 40. Each of the shafts -40 which operate the ,screws 34 is provided with a beveled gear wheel 64 which engages a beveled gear wheel 65 mounted upon a shaft 66.

This shaft at its opposite end carries a bev- I .eled gear wheel 67, in turn meshing with a beveled gear wheel 68 mounted loosely upon a shaft 69. Operating on this shaft isa clutch which is adapted to be shifted into or out of engagement with the beveled gear wheel 68 and this causes it to rotate withthe shaft 69 or to run loose. Each clutch70 is operated by means of a lever 71. Each shaft 69 also carries upon it a sprocket wheel 72, and the shaft 69 is operated from a countershaft 7 3 driven by the motor and having upon it the sprocket Wheel 74 over which a sprocket chain passes to the sprocket wheel 72. Thissprocket wheel 74 is loose on the shaft-73. J i a a ill) Also loose-upon the shaft 73 is a gear wheel 75 which meshes with a gear wheel 7 6 mounted upon the shaft 69, and between the gear wheel '4' 5 and the sprocket wheel 74 there is disposed the sliding detachable clutch member 77 operated by means of a lever 78. Obviously, when the clutch member 77 is engaged with the sprocket wheel 74, the shaft 69 will be Operated in one direction, and when it is in engagement with the gear wheel 75 the shaft 69 will be operated in the opposite direction. The lever 7 8 also extends into the operators room of the house 18, and by the use of this lever 78 and the two levers 71 it is possible to fully control the operation of the screws at oppo site ends of the supporting frame and also operate the driving wheels to move the transporter in one direction or the other along the track:

It will be understood, of course, and particularly from Figure 1, that the lower portion of the operating room of house 18 is disposed below the level of the water in the canal B, and thus it will be obvious that all those shafts which project through the lowest floor of the house 18 must be packed so as to-prevent any. inlet of water, and that the lowest portion, of the house must be entirely Water-proof. Inasmuch as 1 this house is verynarro'w, the meehanisni illustrated in Figure 5 may be placed directly above the motor, which is on the lower floor of the house, and the mechanism illustrated in Figure 5 for operating the screws may be placed above the mechanism for operating the driving wheels. The operators r'oom may he placed above these two floors, the controlling levers sticking through the floor. 7 a

' In: the operation of this transporting apparatus, the boat to be transported is taken into the basin B and tied up to a post 79 on the land. The transporting mechanism is then rolled beneath the boat. When the transporter is at a suitable place where the boat may rest up-onthe cradle without placing strain upon the water wheel or screw and the rudder, then the boats crew throw a rope over the posts 33' at either end, untying' the boat from the post'75 and pulling the boat over against the posts 33 and fastening it there. At this point there may be two feet of water between the bottom of the boat-and the cradle 48 more or less. Now the operator starts up the transporter and moves over this track, and i'nasn'ruch'as the boat is fastened to it'the boat is dragged with it.-, Now when the transporter moves onto the inclined track, the operator starts the mechanism illustrated in Figure 5 for raising thejrea-r end of the-elevating frame, and this, is so timed that when the rear wheelsof the transporter have reached the grade the rear end of the carrier or elevating frame is raised to a horizontal position. Of course, atthis time the safety lock 44 has been withdrawn at the rear end of the carrier, while at the frontend of the carrier the lock is projected, securely holding the carrier to its trunn'ions, As the transporter goes up the grade it will, of course, raise the cable bed upward, bringing it closer and closer to the bottom of the boat until it touches at one point or another and starts to support the weight of the boat. As it recedes,- it takes more and more ofthe weight of the boat until the boat is lifted entirely above the water. The transporter then moves on up the grade (see Figure 2), and as soon as the front wheel of the transporter touches the level stretch at the upper end of the grade,- the rear end of the carrier or elevating frame is let down so that at about the same time the rear wheels of the transporter touch the level stretch at the top of the grade, the boatcar'rie'r will rest on both of its trunnlons again. Thesafety look at this end is now projected. The carrier may be then movedfdown gra'deinto a basin of water until the cradle 43 has released the vessel and moved down .below the same, after which. the vessel may be towed on out and 'theitransp'orter may be then returned; If, on the-other hand, the transporter is to carry a vessel not only up a grade as, for instance", a hill and then down again on the other side, then when it moves down the grade the safety lock on the front end of the transporter? is withdrawn and as soon as the front wheels of the transporter touch the grade, the front end of the carrier is raised. As'soo'n as theboat or vessel is floating free, it'may be tied up to the bank and thenthe transporter withdrawn out of the way. The transporter is then ready for the nextboat either wa i It: will be seen that the boat or vessel is held in a horizontal position at all times without regard to whether there is a grade or' not.- The, transporter needs only one man to handle it and power may be taken to the'motor from an overhead trolley wire 80, by means, of the,- trolley pole 81. Any other method of delivering electric current to the motor in the house 18 may be used or the motor may be" driven by any other power than electricity. It will be seen that this mechanism permits vessels longer or shorter than the transporter to be lifted and transported and'that' these vessels are securely held ,in place without strain and supported, along the entire length of'the bottom; The cables 43 a=nd the links" 12 and the springs 41 are all yielding to permit the cablesto conform to the bottom and distribute: the strain'allover the entire, cradle. The, vessel: may be disposed within the transportereither with its bow or stem at the forward or rear end of the transporter. Of course, the rear paddle wheels, propeller or rudder must project beyond the trans porter, as illustrated, as these parts would be damaged by the cables of the cradle.

I do not wish to be limited to the exact details shown, as it is obvious that these may be changed in many Ways without departing from the spirit of the invention.

I claim 1. A boat transporting apparatus including a wheeled main frame having means whereby it may be propelled, a boat carrier, fulcrums disposed at oppositeends of the frame and with which opposite ends of the carrier are adapted to engage, and means on the carrier for raising or lowering each end of the carrier independently of the other end.

2. A boat transporting apparatus including a wheeled main frame having means whereby it may be propelled, a boat carrier disposed above the main frame, fulcrums disposed at opposite ends of the frame and with which opposite ends of the carrier are adapted to engage, elevating means mounted on the main frame at the opposite ends thereof and operatively engaging the carrier, and means on the carrier for in lependently operating the elevating means at either end of the carrier whereby to hold the boat at all times in a horizontal position while the main frame is inclined.

3. A boat transporting apparatus includ ing a wheeled main frame having means whereby it may be propelled, a boat carrier mounted upon the main frame," ful-- crums disposed at opposite ends of the frame and with which opposite ends of the carrier are adapted to engage, elevating means mounted on the main frame at the opposite ends thereof and operatively engaging the opposite ends of the carrier, means on the carrier for independently operating said elevating means, and means for locking either end of the carrier to the main frame against vertical movement but permitting oscillation of the carrier.

4. A boat transporting apparatus including a wheeled main frame having means whereby it may be propelled along horizontal or inclined tracks, the main frame being formed to provide two opposite parallel vertical portions, a boat carrier disposed within the main frame, means at opposite ends of the main frame constituting fulcrums for the boat carrier and upon both of which means the boat carrier rests when in a horizontal position, and means on the main frame operatively engaging the opposite ends of the carrier whereby either end of the carrier may be raised or lowered independently of the other.

5. A boat transporting apparatus including a wheeled main frame having means whereby it may be propelled either along horizontal tracks or inclined tracks, bearings mounted at opposite ends of the main frame, a boat carrier disposed within the main frame and having laterally projecting trunnions engageable in said bearings, each of said bearings being open at its upper end whereby the trunnion may be lifted from the bearing, means at opposite ends of the frame wherebythe corresponding end of the carriermay be raised or lowered, and power means for independently operating said raising or lowering means.

6. A boat transporting apparatus including a boat carrier having upwardly extend ing side members, a cradle adapted to receive the-hull of the boat comprising transversely extending cables, and contractile springs connecting said cables to the lateral members of the carrier.

'7. An apparatus for transporting boats from a basin at a lower altitude to a basin at a higher altitude and vice versa including rails disposed horizontally in said basin and at an inclination from the lower basin to the higher basin, one of said rails being cogged, a transporter including a main frame having wheels and adapted to run upon said rails, certain of the wheels being cogged to engage the cogged wheel, power operated means for driving said wheels, a boat carrier disposed within and carried by the wheeled main frame but free to move vertically with relation to the latter and having a cradle to engage the bottom of the boat, means at opposite ends of the frame adapted to form a fulcrum for the opposite ends of the carrier means for locking either end of the carrier to the corresponding fu1crum,- and means at each end of the main frame whereby that end of the carrier may be lifted to thereby tilt the carrier with relation to the main frame.

8. A boat transporting apparatus including a wheeled main frame having means whereby it may be propelled either horizontally or up an incline, the wheeled frame being formed to provide vertically extending sides, a carrier having vertically extending sides disposed between the sides of the main frame, a resiliently yieldable cradle mounted upon the upper end of the carrier and adapted to support the hull of a vessel, means at each end of the carrier and main frame whereby either end of the carrier may be fulcrumed upon the main frame, means for locking either end of the carrier to its fulcrum but said means permitting the other end of the carrier to be raised, and power operated means disposed at each end of the main frame and engaging the corresponding end of the carrier whereby either end of the carrier may be raised or lowered.

9. A boat transporting apparatus includ* ing a wheeled main frame having means whereby itm'ay z he propelled either homettallyv 01: up in incline the Wheeled fram beingfermed' to plfovide vertically extending si desg a cat tier having vertieallly' ezitend ingsidh s dispesed hetfween the sides pf the mh-in ffginie a cradle fnounted upon th e upper end f the carrier and adapted to', s'u"p port the hull of VesseLiheans at ealeh end offthe carrier;and? main frameflwhefehj either end'ef the, earrier may be fuleruih'ed uppn the ma in frame, means 01; lo eking either end of the carrier teitis fulcrum hut siiid Ineans perlnittihgl the other end (if the 'Qx njien it) he vlfaise'd, jack ,screws mounted at; jeejch ehd of theme-in fial 'r ie'iaiid Operetivel'yl en agin :e'a eh en d of the earri'ei' wh'efebfi either end 9f the carrier may be rztisd'ionlbw'ered independently of the'ether end; and manually eontiviledgipewer Opel" ated means for operating" either set" of jack 16, A beatlti ansporting apparatus includdjthe eled lhaiii fi'aiiie im ingjmeans whefebyfit' may hephepelled either he'riz'o'ntallj 01' up an inclined surface and having sides a rrier disposed Within 7 said sides, the curifiel" supporting. a erzidl'e t0 engtgethe hull of a heQt, 6p:eI 1 -e1ided bearihg meiiibe'r's' disposed at bplpositeendst the main fiaifie, thunnidns nio untejdiupon V the? ctrrierat' o'ppb site ends 10f the earlier andeng a'ge'ib1e said bearihgf neniher's, the-ans at opposite ends of the in ain' frame and ngaging; the carrier Wherehy either' eiid of the ceri'ie may be raised fioin itsbem-in emeans' fer kickingE either end" of the earlier ageiiist nevelnent off its heziriiigs, a motor czii'ried on' "the ihuih flame and mnuauy pane-oiled mea s fo applyiiig the150 uiehefithe otor te the elev atihg means at ei1ch' end. the 11min fi'iuiie wh erehy to eiaiise eithehehd of the Carrier" t'd he ihised "0'1 lbwei'el' 11. A heat transporting appar'g I s'in'clu'd i iigl tl Wheeled main fi 'aiii'e having. means whereby it maybe propelled e'itheihoiiz'ontilllji o'r' ah ink-lined s'u fae'e zindihiliiihg side's, Carne disposed. Within said ides; he ca r riefeuppm-ting a [cradle tb engage the 111111 Ufa that, epemendedh'e'aring' mmbers' disposed at opposit'e'"endsjbfthe'maingimme; truhiiidh's mounted upon the chi e1 atoppio: site eii'ds 'of the carrier "a'ud eligageable "with s'iiid" bearing; me1nbers',meafis at opposite en'dsofwhe main fihnie anidf engaging the" efi'riie'i" whereby either' end of: the" ear lei maybe ftifsed'fi'ih its bearings;meme-01- lacking: e'ithf'e l 'flen df (if the earlier against tfibi elhentfefi" its Bea-ring a mote-r7 ezirried on the Iflaiii" frame, I manually edntfelle'd ineansf applying l'the "power 'p'f the? meter te the eleYitingfin'e jns ljt eziehendof the vii sit"

ibo

mechanism.

lib

house for propelling the main frame or operating said raising and lowering means at either end of the main frame of the carrier.

14. A boat transporting apparatus including a wheel main frame having means whereby it may be propelled, a boat carrier disposed within the main frame, a plurality of jack screws at each end of the main frame, power operated means for rotating the jack screws, the carrier having at its ends longitudinally projecting members and a mem ber at each end of the frame through which the jack screws pass and having screwthreaded engagement therewith, said members extending beneath the projecting ends of the carrier whereby when a set of jack screws is operated the corresponding end of the boat carrier will be raised, and means at opposite ends of the boat carrier and main frame for fnlcruming the boat carrier thereon.

In testimony whereof I hereunto aflix my signature.

JOHANN J. R. HAALCK. 

